Did you also ask Poco Sales for the quantity 3 price? About four years ago I ordered an Airpax breaker from Poco, but I ordered three breakers for a total price of not that much more than if I had pu
So what you are getting at is recreating the crowbar circuit to trip things just like the AC supplies do? (At least that's what the Century 21 does off the top of my head.) -- Neal <snip> -=-=-=-=-=
Author: "Dr. Gerald N. Johnson" <geraldj@weather.net>
Date: Sun, 02 Jan 2011 14:42:53 -0600
Crowbars are usually a fast shut down to protect from over voltage (like a shorted regulator transistor). Current limits shut down the supply when overloaded without shorting it out, they just cut ba
Jerry: Thanks. I have the original breaker that Ten-Tec used on the Corsair and it translates to an Airpax "instant trip", which are scarce. The fast trip appears to be an acceptable substitute, thou
Dr. Jerry: I stand corrected. Guess I've been away from things too long. Back to the books for a refresher! -- Neal, NL7VL/9 _______________________________________________ TenTec mailing list TenTec
This is the quote I got from Poco for the fast trip breakers: *T11-1-20.0A-01-11C-V *@ $12.50/ea* *Parts are in stock *T11-1-5.00A-01-11C-V *@ $12.50/ea* *Delivery 8 weeks ARO The instant trip breake
No, not the crowbar, which is used for overvoltage protection, but the current sense circuit. Bob WB2VUF _______________________________________________ TenTec mailing list TenTec@contesting.com http
Author: "Dr. Gerald N. Johnson" <geraldj@weather.net>
Date: Sun, 02 Jan 2011 19:30:07 -0600
I put a diode in series with the relay coil to make it an amplified polarity protector too. I also put a diode across the relay coil to squelch inductive kick. It was intended that the switch in the
Author: "Dr. Gerald N. Johnson" <geraldj@weather.net>
Date: Sun, 02 Jan 2011 20:51:57 -0600
From the 1140 Tentec wiki page: Be on the look out for variations on this breaker for different colors, mounts, shapes of the operating handle, package, and nuts and with auxiliary contacts. These va
No, not trivial to replace. The Corsair front panle has to be removed I think. Pots and switches of the correct size and ratings are hard to find. I remember years ago, Centralab had modular replacem
Author: "Dr. Gerald N. Johnson" <geraldj@weather.net>
Date: Tue, 04 Jan 2011 20:21:40 -0600
Almost sure to use audio taper for audio gain. You can emulate an audio taper with a linear taper pot by adding a resistor from wiper to ground. Usually about the same resistance as the pot resistanc